Overview
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In altibase_boot.log, a large number of messages with the title "reset Mutex Statistics" may be recorded. This document provide provides a brief description of this message.
Situation
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The following message may be repeatedly recorded in altibase_boot.log.
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--- reset Mutex Statistics --- |
Cause
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This message is output when the values of the try_count, lock_count, and miss_count columns of the v$mutex performance view table exceed the maximum value and the values are initialized.
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v$mutex records mutex information related to concurrency control in the database. If the values of the columns continue to increase and exceed the maximum value, a value overflow occurs. When the maximum value of integer type is reached, the corresponding value is recorded in altibase_boot.log, then initialize to 0.
Solution
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When the maximum number of columns that can store mutex-related information is reached, the information is recorded in altibase_boot.log, and there is no particular problem or action required.